I wrote a program and user will pick name from a combobox, and the name will be write and saved to a textfiles.ini which is residing in the same folder, when form close. When user launch program again, it will read the name in the textfiles.ini and load the name in the combobox.. all works okay when test on my laptop before I compile. But after I compile using 'Device(Force QVGA)EXE' and transfered the 3 compile files (.dll, .exe, .exe.config) to my mobile phone, and launch .. user choose name in combobox and close form, the program does not write & saved name in combobox to textfiles.ini.. it juz create the textfiles. Hope I'm clear .. appreciate help.